Tout-sous limyè ak pèsepsyon koulè. Full-spectrum light sources will probably provide excellent color rendering. Endèks rann koulè (CRI) values for full-spectrum lighting sources are typically greater than 90. Color is a human perception constructed from the combination of the distribisyon pouvwa espèk (SPD) of the light source, the spectral reflectance of the materials being illuminated, and the tri-chromatic nature of the human visual system. If there are gaps or large variations in the SPD of a light source, there is a potential for confusion between the apparent colors of objects. Since full-spectrum light sources usually provide radiant power throughout the visible spectrum, subtle differences in the spectral reflectance characteristics of different objects are discernable. So, when color identification is part of the visual task, such as for graphic arts, museums and color printing applications, full-spectrum light sources will ensure good color discrimination.
Sous limyè -tout spectre ak pèfòmans vizyèl. Sous limyè spectre konplè-p ap bay pi bon pèfòmans vizyèl pase lòt sous limyè nan pifò sikonstans. Pèfòmans vizyèl se vitès ak presizyon nan pwosesis enfòmasyon akromatik (pa egzanp, enprime nwa sou papye blan) pa sistèm vizyèl imen an. Nan nivo limyè relativman wo yo anjeneral yo jwenn nan lekòl yo ak biwo yo, pèfòmans vizyèl se esansyèlman afekte pa distribisyon pouvwa spectral sous limyè a, kidonk sous limyè spectre plen-, lumèn pou lumèn, pa pi bon pase nenpòt lòt limyè. sous.
Lighting produced by full-spectrum lamps may be, however, perceived as providing brighter architectural spaces than other lamps (Boyce, 2002; Berman, 1990). Three factors may contribute to this effect. First, full-spectrum light sources typically have a high Tanperati koulè ki asosye (CCT) of 5000K - 7500K. Lamps with higher CCT values produce greater brightness perception than lamps with lower CCT of the same luminance. Second, most full-spectrum light sources have high color rendering properties, meaning that surface colors will appear more saturated. Greater saturation will also give the impression of greater brightness (Boyce, 1977). Third, the ultraviolet (UV) radiation produced by some full-spectrum fluorescent lamps has a fluorescing, brightening effect on textiles and paper that have been treated with whitening agents. These combined effects on brightness perception may indeed have positive impact on building occupants, but greater perceived brightness can also be a liability, depending upon the expectations of the space's occupants (Veitch and McColl, 2001).
Sous limyè -tout spectre ak sante. Sous limyè spectre konplè-p ap bay pi bon sante pase pifò lòt sous limyè elektrik. Rechèch ki sot pase yo te montre ke aktivite chak jou moun yo fòtman enfliyanse pa sik limyè solè / fè nwa. Ki pi remakab nan sik sa yo chak jou, oswa sirkadyèn, se sik la dòmi / reveye; men lòt aktivite ki gen ladan konsyans mantal, atitid, e petèt menm efikasite nan sistèm iminitè a pase nan modèl regilye chak jou. Limyè se estimilis anviwònman ki pi enpòtan pou regle sik sirkadyèn sa yo ak senkronize yo ak jou solè a. Kout longèdonn (ble) limyè se patikilyèman efikas nan reglemante sistèm sirkadyèn nan; limyè longèdonn long (wouj) se aparamman enkonsekans nan sistèm sirkadyèn nan. Kidonk, pou maksimize efikasite nan afekte sistèm sirkadyèn nan, yon sous limyè pa ta dwe imite yon spectre konplè, men olye yo ta dwe maksimize sèlman longèdonn kout. Menm si yon -sous limyè spectre konplè gen ladan limyè longèdonn kout nan spectre li, li pa pral nesesèman asire bon règleman sirkadyèn paske, anplis, entansite apwopriye, tan, ak dire ekspoze limyè a yo tout egalman enpòtan pou regilasyon sirkadyèn satisfezan (Rea et. al, 2002).
Light therapy treatment of seasonal affective disorder (SAD) usually involves regulated exposure to a white light source, commonly 10,000 lux at the eye for 30 minutes per day (Partonen and Lönnqvist, 1998). Any white light source will be effective at these levels (Lam and Levitt, 1999), so full-spectrum light source is in no way special for treatment of SAD.
Full-spectrum light sources have no demonstrable benefit for dental health. These claims have no scientific merit (McColl and Veitch, 2001). The section, "Is ultraviolet radiation production important?" gives more detail.
